diff options
Diffstat (limited to 'libreport/src/lib/logging.c')
| -rw-r--r-- | libreport/src/lib/logging.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/libreport/src/lib/logging.c b/libreport/src/lib/logging.c new file mode 100644 index 00000000..72aa2423 --- /dev/null +++ b/libreport/src/lib/logging.c @@ -0,0 +1,148 @@ +/* + Copyright (C) 2010 ABRT team + Copyright (C) 2010 RedHat Inc + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +/* + * Utility routines. + * + */ +#include "libreport.h" + +void (*g_custom_logger)(const char*); +const char *msg_prefix = ""; +const char *msg_eol = "\n"; +int logmode = LOGMODE_STDIO; +int xfunc_error_retval = EXIT_FAILURE; +int g_verbose; + +void xfunc_die(void) +{ + exit(xfunc_error_retval); +} + +static void verror_msg_helper(const char *s, + va_list p, + const char* strerr, + int flags) +{ + char *msg; + int prefix_len, strerr_len, msgeol_len, used; + + if (!logmode) + return; + + used = vasprintf(&msg, s, p); + if (used < 0) + return; + + /* This is ugly and costs +60 bytes compared to multiple + * fprintf's, but is guaranteed to do a single write. + * This is needed for e.g. when multiple children + * can produce log messages simultaneously. */ + + prefix_len = msg_prefix[0] ? strlen(msg_prefix) + 2 : 0; + strerr_len = strerr ? strlen(strerr) : 0; + msgeol_len = strlen(msg_eol); + /* +3 is for ": " before strerr and for terminating NUL */ + msg = (char*) xrealloc(msg, prefix_len + used + strerr_len + msgeol_len + 3); + /* TODO: maybe use writev instead of memmoving? Need full_writev? */ + if (prefix_len) { + char *p; + memmove(msg + prefix_len, msg, used); + used += prefix_len; + p = stpcpy(msg, msg_prefix); + p[0] = ':'; + p[1] = ' '; + } + if (strerr) { + if (s[0]) { + msg[used++] = ':'; + msg[used++] = ' '; + } + strcpy(&msg[used], strerr); + used += strerr_len; + } + strcpy(&msg[used], msg_eol); + + if (flags & LOGMODE_STDIO) { + fflush(stdout); + full_write(STDERR_FILENO, msg, used + msgeol_len); + } + msg[used] = '\0'; /* remove msg_eol (usually "\n") */ + if (flags & LOGMODE_SYSLOG) { + syslog(LOG_ERR, "%s", msg + prefix_len); + } + if ((flags & LOGMODE_CUSTOM) && g_custom_logger) { + g_custom_logger(msg + prefix_len); + } + free(msg); +} + +void log_msg(const char *s, ...) +{ + va_list p; + + va_start(p, s); + verror_msg_helper(s, p, NULL, logmode); + va_end(p); +} + +void error_msg(const char *s, ...) +{ + va_list p; + + va_start(p, s); + verror_msg_helper(s, p, NULL, (logmode | LOGMODE_CUSTOM)); + va_end(p); +} + +void error_msg_and_die(const char *s, ...) +{ + va_list p; + + va_start(p, s); + verror_msg_helper(s, p, NULL, (logmode | LOGMODE_CUSTOM)); + va_end(p); + xfunc_die(); +} + +void perror_msg(const char *s, ...) +{ + va_list p; + + va_start(p, s); + /* Guard against "<error message>: Success" */ + verror_msg_helper(s, p, errno ? strerror(errno) : NULL, (logmode | LOGMODE_CUSTOM)); + va_end(p); +} + +void perror_msg_and_die(const char *s, ...) +{ + va_list p; + + va_start(p, s); + /* Guard against "<error message>: Success" */ + verror_msg_helper(s, p, errno ? strerror(errno) : NULL, (logmode | LOGMODE_CUSTOM)); + va_end(p); + xfunc_die(); +} + +void die_out_of_memory(void) +{ + error_msg_and_die("Out of memory, exiting"); +} |